Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3392ffa585a149bad92b25f48426c8941d388fd2401d4b278941bbcb5194c314:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^